20EMA/MA五分钟图
在过去一周的交易时间内，以20EMA/MA五分钟图为参考标准，金叉买入，死叉卖出，一共是7次机会，6次有明显获利机率，一次金叉未突破。
我又观察了7/20以来的图形（Tradingview的免费数据只到7/20），
78次有明显获利机率
7次死叉位置低于金叉，但是都是非常小的幅度
18次金叉之后未能持续上升，理论上是平手，但是考虑交易成本和操作误差，可以归类为极小幅度的亏损交易。
QQQ做为一个投资标的有一些比较普通但对普通投资者非常有利的特征：
可以长期持有
越跌越值得买
不需要频繁投资分析
TQQQ的波动幅度比QQQ大得多，对投资者的能力要求也相应的高出许多，对一般投资者，QQQ可能是一个更好的选择。
've learned many things from him （George Soros）, but perhaps the most significant is that it's not whether you're right or wrong, but how much money you make when you're right and how much you lose when you're wrong.
- Stanley Druckenmiller as quoted in The New Market Wizards
The trouble with you, Byron [Byron Wein – Morgan Stanley], is that you go to work every day [and think] you should do something. I don’t, I only go to work on the days that make sense to go to work. And I really do something on that day. But you go to work and you do something every day and you don’t realise when it’s a special day. - George Soros
